Saw-gin



(No Model.)

J. A. BACHMA-N.

, SAW GIN. '110. 462,189. Patented Oot.27,1891.

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UNITED STATES PATENT JOSEPH A. BACHMAN, or AUSTIN, TEX/xs.'

SAW-GIN.

SPECIFICATION forming part of Letters Patent No. 462,189, dated October27', 1891 Application filed December 22, 1890. Serial No. 375,482. (Nomodel.)

To ft// whom it' may concern:

Beit known that I, JOSEPH A. BAOHMAN, of Austin, in the county ofTravis'and State of rlexas, have invented a new and Improved Saw-Gin, ofwhich the following is a full, clear, and exact description.

4-My invention relates to improvements in cotton-girls; and the objectof the invention is to produce a gin which will do a great amount ofwork, which will occupy but little space, and which' will separate thecotton into parts of different quality.

The various parts of the machine embodying my invention are not inthemselves new, but the parts are arranged in such a manner as to form anew combination. As gins are ordinarily constructed, the seed and lintare entirely Separated in one roll box or hopper, and the operation ofthe machine is comparatively Slow, as it takes a considerable period oftime to entirely separate the lint from the seeds; but by means of myinvention the operation is. performed in less than one-haii` the time,owing to the upper roll-box boing especially adapted 4to raw cotton andthe lower one to half-ginned cotton, as the lint and seeds are onlypartially separated in one rollbox and are then delivered into another,where the operation is completed.

My invent-ion consists in certain features of construction andcombinations of parts, which will be hereinafter fully described, andthen pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in both the gures.

Figure l is a side elevation ot the machine embodying my invention, andFig. 2 is a vertical longitudinal Section of the same.

The frame-work or casing A is divided by a horizontal iioor A, extendingcentrally through it into two compartments, each of which communicatesby a iiue b with a main flue B, which discharges into a condenser in theordinary way, and mounted in the front portions of the frame-work ineach of the compartments are the saws C and C', behind which are brushesD and D', respectively, which revolve in opposite directions to the sawsand which brush the lint from the saws, and at the same timecreate acurrent of air strong enough to drive the lint up through the fiue B.

The saws and brushes are ofthe usual construction, andthe saws projectthrough grates F and F', respectively, into the roll-boxes E and E',which are arranged one above theA other, as shown, and which haveopenings E2 at the bottom, and are also open at the top, so that thehalf-ginned cotton in the Lipper rollbox will be delivered into thelower box, and the seeds may be allowed to drop from the lower box inthe usual manner.

In the bottom of each box E and E is a regulatingplate e and anadjusting-screw e for the same, which plates are used for regir latingthe cleaning of the seed in the ordinary way and form no part of myinvention. The saws C and the grates F in the upper portion of thecasing A arev coarser than the saws and grates in thelower compartment,and the regulating-plate in the upper roll-box E is adjusted so that theupper saws will only remove the best and longest ibered lint from theseeds, and this will be removed from the saws by the brush D anddelivered into the flue B. The half-ginned seed will drop into theroll-box F and the finer saws C will separate the remaining portion ofthe lint from the seeds, and this will be removed by the brush D andalso be delivered into the flue B. lt will thus be seen that the ginwill work faster than two ordinary machines, as only half the work ofginning is done in one rollbox and finished in the other, each box beingespecially adapted to the condition of the cot,- ton at the differentstages of the operation.

In the drawings [have shown the upper and lower brushes arranged todeliver into one 'Hue B; but it is obvious that separate flues may beprovided, and that thus two qualities of cot-ton may be produced, and itis also evident that the arrangement of the device may be carried out toa iurther extent and three or more sets of saws and brushes provided;but in practice two sets are found most convenient. v

The shafts on which the saws and brushes are'xed extend outward throughone side of the casing A, and the ends of the saw-shafts are providedwith pulleys C2 and C3 and the brush-shafts are provided with pulleysDzand D3, and the brushes and saws are all driven IOO by one belt G,which extends over a drivingpulley G', and is then made to extend aroundthe other pulleys and over an idler H on the upper portion of the frameor casing. The idler-pulley H is mounted in a box H', which movesvertically in a slideway a of the main frame, and the box is pivotallyconn ected With alever J, by means of which the box and I pulley may beraised, thus tighteningV the belt G.

I have not shown the detailed construction of the lever and boX, as anymeans may be used for raising` the latter. lt Will be seen by referenceto the drawings in the Fig. l that the pulleys are arranged in suchamanner that the belt extends around a greater portion of theirbearingsurfaces and agreat deal of power Will thus be imparted to themand the saws and brushes with Which they are connected.

I do not claim in detail the construction of the parts described above;but the arrangement of the coarser and finer saws and the roll-boxes andgrates for the same embody the essential features of my invention.

The operation of the machine will be readily understood. The cotton isfed in a raw state into the upper roll-box E in the usual manner, thecoarser lint is separated from the seeds in the usual manner, and theseeds and the liner lint drop into the'lower roll-box, Where theoperation of ginning is completed.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- A cotton-gin comprising a case having twocompartments therein, one above the other, and provided with a commonflue, a roll-box for each compartment, one being made to deliver intothe other, grates of different degrees of neness for the roll-boxes,revoluble saws of difterentsizes mounted in the comy partments andprojecting through the grates,

and revolving cleaning-brushes for the saws, substantially as shown anddescribed.

JOSEPH A. BACHMAN.

Witnesses:

WILLIAM M. NORTH, A. GIEsEN.

